F800 Toy Hauler
 

I recently picked up this 1995 F800 crew cab flat bed with 8.3 Cummins and 9spd Roadranger. Now I have seats for the whole family, space on the 15.5' flatbed for my toys and enough towing capacity to pull any trailer I want.

https://www.pirate4x4.com/forum/membe...stock-f800.jpg

Thanks to Neal and Porkchop I now have a set of narrow Axletech 4000s to put under it. With the 5.65 gears I will need to run a tall tire, but I happen to have a set of 53 Michelins (16R20) sitting around waiting for a home. The 14,500lb rating should be more than enough for the 18,000lb and 20,000lb capacity axles. Now I just have to do some fab work and get these axles under the truck. The narrow WMS will require 50/50 offset wheels to clear the frame, hopefully that will be enough. Worst case I will have to put the 5.65 gears in a wide set of axles. The WMS on the stock I-beam front axle is about 95".

In the long run I want to link and air bag the suspension, although for now I may try and bolt in the front axle since the spring perches look like they will match up (33.5") Since the truck has air brakes stock I'm guessing the brakes on the Axletechs will work great.

Sounds cool, going to be a tall SOB with a rig on a flat bed and 53s. Would be badass to set it up like a Dakar race semi.

Do you need a transfer case and driveshafts? I have some NOS 1480 sized driveshafts that fit the flange of the narrow Axletechs. The other end fits the matching Axletech T600. I also have the transfer cases.

I'm not sure yet. I will need at least the waffle pattern drive flanges to mate up to the axles. I have a T-case out of a 2.5 ton Ford dump truck and the matching drivelines to go with it. I have to measure and see if they are the right size for my 800. How much do you want for the T600 case and drivelines?

Most people usually buy 3 driveshafts and a transfer case. I get $700 for that + shipping which is usually about $200 with Fastenal.

This sounds like it's going to be one bad mamma jamma

oooh, im looking into doing something similar soon........watching!

I like this!

I went the same route 97 F800 I have the 5.9 but it pulls nice since i turned it up a bit. Your pic convinced me on the black bumper and wheels looks good.

Sweet rig!!! Gonna be tall on that much tire.

That sounds reasonable. Any chance you could add 5 centered steel wheels to the shipment? I'm at 97374
1480 joints seem awfully small? The current joints are probably 1550-1650. I'll measure tomorrow.

My first project is flipping the oil pan around for front axle clearance. Since the same engine comes in 6x6s I assume there is a rear sump option. The oil pan bolts look symmetrical so I may be able to switch the pan end-for-end and build a new oil pickup tube. Or get one from a 6x6?

These axles are huge, they make the 2.5 Rockwells my buddy picked up look small.
http://i21.photobucket.com/albums/b2...psdrl3c95q.jpg

I don't have any of the 50/50 offset steel wheel. I only have the 24 bolt Hutchinson's that have a lot of backspacing.

These driveshafts from what I understand were the front driveshaft on the vehicles that these narrow track AT4000's were in. I know there is a flange that fits them that uses a 1710 u-joint. I have sold some of these axles and transfer cases to a few people building medium duty trucks like yours. They are using the 1480's from the transmission to the transfer case and on the front axle. They use the 1710 on the rear. I can probably get the part # for that flange if you need it.

I hate to drop from 1710 to 1480. The dump truck case I have now has a small input and 1710 or so outputs. How much do the 1710 flanges cost? With the length of the engine, trans and T-case I'm wondering if a two piece front driveline will be necessary.

The driveshafts are about 33" collapsed or 39.5" extended. I don't know what the cost of the 1710 flanges are but I think they said that they were not very cheap. I can try and message some of the people who have bought them and try and get the part # and about how much they cost if you want.

That would be great. I'm not so concerned about the front driveline, but the rear needs to stay the current size.

Anybody have an idea on the torque rating of the T600 T-case or AT4000 axles? I suspect my rig will be pushing the limits. Currently it sits at 16,400lbs empty and I expect to have a 35,000 CVWR when towing a CAT or two rigs on a 35' trailer.

The part # for the 1710 flange is a Dana Spicer 6-2-15. It is $242.04 from Dennysdriveshaft.com

Toque rating is 5150 lb/ft in high range and 2950 lb/ft in low range


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Torque for the axles or T-case?

Thank you for the part number, I think it will be worth it to avoid the 1480s.

http://i21.photobucket.com/albums/b2...psdkx9kjg5.jpg

And the front
http://i21.photobucket.com/albums/b2...psmrgnudj4.jpg

Anyone have a source for the 50/50 Centered Steel MRAP wheels?

I can get a set of 5 from Texas for $750 plus $272 shipping to 97374. So far $150 each is the best I've found. Unfortunately the centered wheels are pretty rare and I won't get enough width with the common offset wheels.

I have the metal inserts already to go with my 16R20s.

That's the transfer case torque rating straight from Axletech's site

I like it.

Check on Steelsoldiers for the MRAP wheels.

Why not run a 14R20 at 46"?

Me too

X2

46" would be 15.5R20 or 395/85R20. 14.00R20 tires are roughly 48"

That's if you can believe the sidewall marking.

I have 6 mil trucks with 14R20's. They're all new tires, 3 different brands, three different height tires.


Average is 46" especially on the Mich XZL's on my wrecker.

I thought the 15.5r20 Michelin's were a 48/49" tire? I may be wrong though. The numbers/sizes do seem different with different manufacturers.

I also thing 46's, especially if you got overdrive with that axle ratio would work good.

I am in for this build either way!